Chapter 4, Problem 25E

Interpretation Introduction

Interpretation: The average molar mass of the atmospheric gases on the surface of another planet and that at an altitude where the oxygen photodissociate is to be calculated.

Concept introduction: The average molar mass of the atmospheric gases is calculated by the formula,

$\frac{1}{\text{Average}\text{molar}\text{mass}}={\displaystyle \sum \frac{\text{Mass}\text{fraction}}{\text{Molar}\text{mass}}}$

Mass fraction of the substance is the fraction of the mass of the substance and the total mass.

To determine: The average molar mass of the atmospheric gases on the surface of another planet and that at an altitude where the oxygen photodissociate.